Push catch for doors



M y 1931- T. F. STUART ETAL 1,305,789

I PUSH CATCH FOR DOORS Filed Dec. 28, 1927 Patented May 19, 1931 UNITED STATES PATENT OFFICE THOMAS F. STUART AND HENRY A. MOORE, LOS; ANGELES, CALIFORNIA; SAID STUART ASSIGNOR T0 MARY E; BIGELOVJ, AND SAID MOORE ASSIGNOR TO ALBERT H.

BRUNNER, BOTH OF LOS ANGELES, CALIFORNIA PUSH oA'ron FOR DOORS:

Application filed December 28, 1927. Serial No. 243,144.

Our invention relates to a latch for doors, panels, and the like, and has for its principal object, the provision of a relatively simple, practical, and readily installed latching derice that is released by the. actuation of a push rod and which automatically moves into latching position under the influence of a spring. Y

1 Further objects of our invention are, to provide a latch that is especially applicable for use on'the doors of cupboards, closets, medicine cases, bookcases, buifets, and the like; further, to provide a latch that is readily adjustable so that it may be easily and quickly installed on doors of different thicknesses; and, further, to provide a latch ofthe character referred to that may be used'in connection with knobs of glass, metal, composition, or wood.

Further objects of our invention are, to generally improve upon and simplify the construction of the existing forms of door latching devices and to provide a latch that is inexpensive of manufacture and the installation of which, requires comparative little time, labor and consequent expense.

With the foregoing and other objects in View, our invention consists in certain novel features of construction and arrangement of parts that will hereinafter be more fully described and claimed and illustrated in the accompanying drawings, in which Fi g. 1 is a vertical section taken through a portion ofa door and a partition andshowingour improved latch applied thereto.

Fig. 2 is a vertical section taken approximately on the line 2-2 of Fig. 1.

Fig. 3 is a vertical section taken through the center of our improved latch.

Fig. 1 is a perspective view of one of the latch members that is adj ustably mounted on the inner portion of the push rod.

Fig. 5 is a perspective view. of the housing that is arranged on the inner face of the door and which supports the latching hook and other parts of the latch.

Referring by numerals to the accompanying drawings which illustratea practical embodiment of our invention, 10 designates a door or other swingingclosureand 11 a partition to the rear of said door. A screw seated in a recess 12 that is formed in the outer portion of the door 10, is provided with athreaded stud 13 that projects from theinner. end of a'knob 14, whichlatter may be formedof any desired material preferably glass and extending axially through the knob and through the threaded stud 13 is an opening 15, the outer end of which is enlarged to form a recess 16.

Formed through the inner portion of the door and communicating with the threaded recess 12, is an aperture 17 and arranged to slide freely through. this aperture and through the axially opening 15, in the knob, is apush rod 18 that is provided on its outer end with a disk 19. The inner portion of this push rod 18 extends a short distance-inwardly from the inner face of the door 10 and said inner portion is threaded as designated by 20.

Positioned against the inner face of the door 10 is a T-shaped plate 21 preferably of metal, said plate being. secured to the door by screws 22 and formed in a center of the upper horizontal portion of this plate, is an aperture 23 that coincide'sywith the opening 17 and through which, the inner portion of the push rod passes.

Formed integral with the vertical member of the plate 21 and projecting from the side edges thereof are plates 24, the upper portions [of which are bent to form a pair of horizontally disposed channels 25 andthe lower portions of these plates arebent into semi-circular shape so as to form a horizontally disposed spring housing 26.

Seated in the intermediate portion of plates 24 is a rivet 27 and pivotally mounted thereon and positioned between said Plates is the rear or inner end 'of a horizontally disposed arm 28, the opposite end of which terminates in an upwardlyprojecting hook 29. A portion of this arm extends downwardly belowthe rivet 27 so that it is positioned in the forward end of the spring housing 27. Positioned within this spring housing and interposed between the depending portion of the arm. and the lower portion of plate 21 is an expansive coil spring 30.

Projecting upwardly from the rear or in ner portion of the arm 28 isa lug 31.

Adjustably mounted 011 the threaded portion 20 of the push rod 18, is a pair of plates 32, the upper portions of which are bent outwardly to form curved seats 33 that receive the push rod and these curved seats have their inner surfaces rib ed in order that they will interlock with the thread. The two plates 32 are secured to each other and clamped upon tie threaded portion of the push rod by he of a screw 34. that passes through the iinediate portion of the plates.

The lower portions of the plates 34 are bent outwardly as designated by 35 and these outerwardly bent portions are arranged for sliding movement in the channels 25 that are formed on the upper portions of plates 2% and, when the parts of the latch are properly assembled, the forward ends of these outwardly bent portions 35, bear against the rear face of lug 35.

Secured to the underside of partition l'lis an Lshaped plate 36 behind which the upwardly projecting hook 29 engages, w nen the door to which our imuroved latch is a lied is closed.

betx *een the first and second fingers and pressure of the thumb upon disk 19 moves push rod 18 through the knob and, as the plates 32 that are carried the inner portion of said push rod move inwardly these will bear against lug 31, thereby swinging arm upon axis, the rivet 27, with the result that the hook 29 is swung downwardly and disengaged fronrt-he keeper or striking plate and the door may now be opened by pulling outwardly on the knob.

\Vhen the door is closed the outer edge of book 29 strikes against the depending portion of plate 36 thus causing arm 23 to swing upon its axis so as to compress spring 30 and, as the hook passes the lower end of the striking plate, it will immediately swing upward under the influence of the compressed spring 30 and'the engagement of the hook 29 with the plate 36 retains the door in closed position.

An especially desirable feature of our invention is the use-of a knob having a threaded stud 13 that is screwed directly into the door 10 and by providing said knob with too axial opening for the accommodation of the push rod, it is not necessary to enclose said push rod in a tube that extends entirely through the knob and the door.

The plate 32 may be readily adjusted'upon the inner portion of the push rod 18 by proper manipulation of screw 34: and, as the inner face of the curvedseats 33 are ribbed, they will very lirmly interlock with the threaded portion of said push rod when the plates are clamped thereupon.

Thus it will b seen that we have provided a push catch for doors that is relatively simple in construction, inexpensive of manufacture, capable of being easily and quickly in stalled and very ellective in performing its intended functions.

It will be readily understood that minor changes in the size, form and construction of the various parts of our improved latch may be made and substituted for those herein shown and described without departing from the spirit of our invention, the scope of which is forth in the appended claims.

We claim as our invention:

1. In a push catch for doors, a knob formed in a single piece from vitrified earthen material and having a portion adapted to be screw seated in a door, said knob having an axial opening, a push rod extending through said opening, a plate secured on the inner face of the door, a spring pressed hook pivotally mounted on said plate, a pair of plates adj ust' ably clamped on the inner portion of said p sh rod for engt-cging said hook and swinging the same upon its pivot and said pair of plates having sliding connection with the plate on the inside of the door.

2. In a push catch for doors, a knob adapted to be secured to a door, said knob having an axial opening, a push rod extending through said opening, the inner portion of which push rod threaded, a plate secured to the inner face of the door, a pair of plates reinovably and adjustably clamped on the threaded portion of the push rod which plates have slidin engagement with the plate on the inside of the door, a spring held hook pivotally mounted on the plate that is secured to the door which hook engaged by the pair 01. plates carried by the push rod and a strik ing plate that is adapted to be engaged by sa 'l hook.

In testimony whereof we atlir: our signatures.

THOMAS F. STUARQ. HENRY A. MOORE. 

